Try re-installing dotConnect Universal. Perform the following steps:
1. uninstall dotConnect Universal;
2. remove all Devart.* and policy.*.Devart.* files from the GAC;
3. clear the Program Files\Devart\dotConnect and Program Files\Common Files\Devart\dotConnect folders;
4. reinstall dotConnect Universal;
5. delete all files from the bin and obj folders and rebuild the project.